The Online Safety Act has taught the Tories that they can get away with anything if they can spin it as "think of the children". I expect to see more draconian limiting of speech under this same guise.
ETA: and after reading the article, the argument of protecting kids mental health is BS. If they cared about mental health they'd fund the NHS so that wait times to see a psychiatrist/therapist reflected the urgency. Social media might add fuel to the fire, but depression doesn't just magically go away if you delete your accounts.